Assert that page_cycler data is present when trying to run tests

chrome/test/page_cycler/page_cycler_test.cc

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
+#include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "chrome/browser/net/url_fixer_upper.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/automation/tab_proxy.h"
 #include "chrome/test/automation/window_proxy.h"
 #include "chrome/test/chrome_process_util.h"
@@ skipping 31 matching lines @@
       test_url = GURL(std::string(kBaseUrl) + name + "/start.html");
     } else {
       FilePath test_path;
       PathService::Get(base::DIR_EXE, &test_path);
       test_path = test_path.DirName();
       test_path = test_path.DirName();
       test_path = test_path.Append(FILE_PATH_LITERAL("data"));
       test_path = test_path.Append(FILE_PATH_LITERAL("page_cycler"));
       test_path = test_path.AppendASCII(name);
       test_path = test_path.Append(FILE_PATH_LITERAL("start.html"));
+      ASSERT_TRUE(file_util::PathExists(test_path)) << "Missing test data";
       test_url = net::FilePathToFileURL(test_path);
     }
 
     // run N iterations
     GURL::Replacements replacements;
     const char query_string[] = "iterations=" TEST_ITERATIONS "&auto=1";
     replacements.SetQuery(
         query_string,
         url_parse::Component(0, arraysize(query_string) - 1));
     test_url = test_url.ReplaceComponents(replacements);
@@ skipping 282 matching lines @@
   RunTest("bloat", true);
 }
 
 #if !defined(OS_MACOSX)
 TEST_F(PageCyclerReferenceTest, BloatHttp) {
   RunTest("bloat", true);
 }
 #endif
 
 }  // namespace